Thanks Vic and yzer for the great info.
I see the lectrasan still advertised, but it might be old stock thats being liquidated.
The purasan is interesting, I'm going to have to read up a little on that model.
Folks don't know what they're missing when using a holding tank Vs a type 1 MSD. Almost every boat I've been on with a holding tank has a noticable although faint "head smell". Boats with a lectrasan don't have a smell, and you just don't have to think about waste as part of the boating experience.
The lectrasan coupled with a electric macerating head (like the sea-era) also solves the problem of inexperienced users, and the pump, pump, pump sound you hear.
Push the button and it all goes away...forever.
Either way I go (electroscan, or purrisan) we're not going through another boating season with an old fashioned, smelly holding tank.
Thanks again